Between the "Regular expression"-Textbox and the "Specify a regular expression
using the syntax supported by the Java Pattern class." Text the following
message is displayed:

HTTP Status 403 -
type Status report
message
description Access to the specified resource () has been forbidden.
Apache Tomcat/5.5.27

The Plugin is working, but the message is confusing.

To reproduce:
1. activate matrix based security
2. create a Anonymous group with the following access rights
All: Read, Job: Configure+Build+Workspace, Run: Update, SCM: Tag
3. go to config page of project using the group from step 2

Textfinder 1.6, Hudson 1.284, Tomcat 5.5.27